I have set security groups in madsonic.When I use madsonic in Clementine player a user is able to see all music albums, even if he can't see them in webui. Celementine uses rest: /rest/getAlbumList2.view?v=1.8.0&c=Clementine&u=USER&p=PASS&type=alphabeticalByName&size=500&offset=0

They work using madsonic webui - a specific user has only access to specific folder and they also work fine in subsonic android app (subsonic android app also uses rest: /rest/getMusicFolders.view?u=USER&p=PASS&v=1.2.0&c=android).